Google announces tech details of Project Glass ahead of launch.

The Google Glass team yesterday released a list of tech specs for the upcoming augmented reality glasses. They will have Wi-Fi and Bluetooth connectivity; 16GB of flash memory, with 12GB usable (synced with Google cloud storage); a 5MP camera for photos and 720p for video; a battery providing a full day of typical usage; and an HD display that will be "the equivalent of a 25 inch high definition screen from eight feet away."

The optimal resolution for photos and video will be 640×360, according to a separate document prepared for developers. Developers using the Google Mirror API to create applications for Glass have also been told not to serve up any advertisements.

"You may not serve or include any advertisements in your API Client," the Mirror API terms of service state. "You may not use user data from your API Client for advertising purposes. You may not sell or transmit any user data received from your API Client(s) to a third-party ad network or service, data broker, or other advertising or marketing provider. For the avoidance of doubt, user data from the API Client(s) may not be used for Third-Party Ad Serving."

That doesn't preclude Google itself from serving ads.

Back to the tech specs. Glass will tether with any Bluetooth capable phone for Internet connectivity, and the Wi-Fi will be in the form of 802.11b/g. A MyGlass companion app allows GPS and text messaging, and this app will require Android 4.0.3 or higher.

The battery will last "One full day of typical use. Some features, like Hangouts and video recording, are more battery intensive." Google did not provide a definition of "typical use."

The glasses will come with a micro-USB cable and charger, adjustable nosepads and "extra nosepads in two sizes." As we reported in February, Glass will deliver audio via a bone conduction transducer, which literally vibrates the bones in your head.

An early version of Google Glass will be available to developers and select customers soon, with general availability planned by the end of this year for "less than $1,500."